Concrete and masonry pavers make durable patio surfaces, but their natural porosity makes them susceptible to staining and weathering. Vexcon Chemicals’ Paver Reneu, a water-based sealer, is designed to keep these problems at bay.

The finish forms a hard, clear, and non-glossy surface that is chemical and slip resistant and helps repel water, according to the company. It can be used on masonry and concrete inside and out and on both horizontal and vertical surfaces.

Paver Reneu can be applied with a sprayer or with a roller. It has little odor and dries quickly to form a non-yellowing and UV-resistant finish that increases wear resistance and extends paver life, the company says. The cured finish also protects against alkali stains, de-icing salts, oil, and common industrial chemicals.

Because the finish is vapor permeable, it doesn’t turn white in the presence of moisture. It’s typically applied in two coats, the first at between 100 and 200 square feet per gallon and the second at between 400 and 500 square feet per gallon.

The finish can be applied immediately after concrete has been finished, as soon as the surface water sheen disappears. Cured concrete or pavers must be treated first with an etching and efflorescence remover.

Paver Reneu is available in 1-gallon containers for between $16.50 and $29, and in 5-gallon containers for between $82.50 and $145. Prices are affected in part by regulations on volatile organic compounds, which vary around the country.

Vexcon Chemicals, 215/332-9997,